Pasco OS-8542 BLACK BODY LIGHT SOURCE Manuel d'utilisateur télécharger pdf (Page 7)

012–07105B Black Body Instruction Manual

Table 1: Prism Coefficients

Table 1 shows the values for the prism used. The graph in Figure 3

shows an inverse square fit of the data.

Thus, we get the values of A=13,900 and B=1.689

with the wavelength given by

Thus, the final equation for the wavelength (in nanometers) is

Determination of the Wavelength from the Angle (using DataStudio)

In DataStudio, the equation for determining the wavelength is listed in the Definition box in the Calculator

window, as follows:

Wavelength = filter (0,8000, (13900/(((1.1547*sin ((Init - Angle)/Ratio))^2 + 0.75)^0.5 - 1.689))^0.5)

where 0,8000 is the filtering range for the infrared light (0-8000 nm)

13,900 is constant A, as described above.

1.689 is constant B, as described above.

1.1547 is

Init - is the initial angle reading measured during data collection

Angle - is the angle measured by the rotary motion sensor

Ratio - is the ratio of the disk radius to the pin radius

ataD,stneiciffeoCmsirP

)mn(htgnelevaWxednInoitcarfeR

007.404677.1

008.534267.1

000.084847.1

001.684647.1

001.6454

37.1

006.785827.1

008.346227.1

003.656127.1

005.607717.1

001.258907.1

000.4101307.1

Figure 3: Relationship between refraction index

and wavelength for light passing through a prism

1 2 3 4 5 6 7 8 9 10 11 12 ... 22 23

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Pasco OS-8542 BLACK BODY LIGHT SOURCE Manuel d'utilisateur Page 7